00001 var isNumber = require('./isNumber');
00002
00031 function isNaN(value) {
00032 // An `NaN` primitive is the only value that is not equal to itself.00033 // Perform the `toStringTag` check first to avoid errors with some00034 // ActiveX objects in IE.00035 return isNumber(value) && value != +value;
00036 }
00037
00038 module.exports = isNaN;